Backrest



FIG. 1 is a front perspective view of a backrest;

FIG. 2 is a rear perspective view of the backrest shown in FIG. 1;

FIG. 3 is a right side view of the backrest shown in FIG. 1;

FIG. 4 is a left side view of the backrest shown in FIG. 1;

FIG. 5 is front view of the backrest shown in FIG. 1;

FIG. 6 is a rear view of the backrest shown in FIG. 1;

FIG. 7 is a top view of the backrest shown in FIG. 1; and,

FIG. 8 is a bottom view of the backrest shown in FIG. 1.

The ornamental design which is claimed is shown in solid lines in the drawings. The structures shown in broken lines in FIGS. 1-8 are for environmental purposes only and do not form any part of the claimed design. The broken lines shown in FIGS. 1-8 along the bottom portion of the backrest between the environmental structure and the claimed design show the boundary of the claimed design and do not form any part thereof. 

CLAIM The ornamental design for a backrest, as shown and described. 